Manufacture of plated or coated iron or steel sheets.



UNITED STATES PATENT OFFICE.

JAMES WALLACE PATON, OF SOUTHPORT, ENGLAND, MANUFACTURE OF PLATED OR COATED IROH OR STEEL SHEETS.

Specification of Letters Patent.

Patented Nov. 17, 1908.

Application mas mine 1, 1908. Serial at. 440,464.

To all whom 'it may concern:

Be it known that I, JAMns WAILACE PATON, subject of the King of Great Britain, residing at Southport, in the county of Lancaster, in the Kingdom of England, haveinvented certain new and useful Improvements in or Relating to the Manufacture of Plated or Coated Iron and Steel Sheets, for whichapplication has been made in Great Britain, No. 22,028, dated October 5, 1907.

This invention has for its object to produce sheets which will resemble very closel sheets of aluminium or other metal whic face is removed by a sand papering or emery papering machine or equivalent mechanism. These plates I coat on one or both sides with a suitable varnish, preferably in a varnishing machine. I then stove the plates until they become about as tacky as a ujube on a.

damp day, and apply powdered aluminium all over the surface by means ofa dusting machine. While. still tacky; the sheet is passed between brushing rollers which distribute the powder evenly over the entire surface, and force it into the varnish evenl The plates are now left to dry or are a litt e further stoved, and are then passed through a burnishing machine, where they receive a good polish and finish. This burnishing machine is preferably provided with velvet coated rollers, but I may under some circumstances pass the sheets first between two smooth steel rollers revolving at diflerent velocities, and then afterwards pass them slowly through the rapidl revolving velvet covered rollers. The p ates are finally stoved and are then ready for market. While speaking only of aluminium heretofore, bronze powders, gold, platinum and other powdered metals will,produce substantially similar results, and I therefore do not bind myself to aluminium; but aluminium powder is the cheapest and best for nearly all purposes of this nature. Further, I have simply spoken of varnish; but this varnish can be either transparent and colorless varnish or it can be colored withany desirable coloring matter, and thus delicate tints can begiven. to the finished article. Plates thus produced I find can be bent, pressed out,

stamped, drawn or spun, and punished very greatly without cracking the aluminium layer or -removing it from the surface that comes in contact with the dies. Furthermore the plate not having been overheated and brought in contact with hot metal, retains all its original toughness and flexibility.

Another advantage the invention has, is that while with tinplate from the very mode in which it is produced, it has to be tinned on "loothsides, there is no necessity for my plates to be coated on more than one unless required, and thus the cost of coating the plate on the other face is avoided, as it is only the outside of plates used for making many classes of boxes or canisters which are required to be coated. Another advantage of my aluminium coated plates is, that they do not 've the peculiar metal taste or smell in handfiing-which is apt to be given by tin.

Hitherto there has been nothing offered as a substitute for tin plate which could be utilized in the same manner as tin plate 71. e. which could be drawn or stamped with dies, or printed on to produce the same effect, as a tm plate. If a plate be merely coated with an aluminium paint, made. up of aluminium and varnish and allowed to dry, the

coatin will crack and comeoff when the plate is bent or stamped, but by my invention, the fact of first varnishing a plate, and then partially .stoving and forcmg the aluminium into the varnish, and stovmg again, and polishing, a coating is produce which for all practical purposes, adheres to the surface as effectually as tin does, and protects the surface from rust, also enables the plate to be used as a substitute for tin plate and at a much-less cost. I am also aware that it is already known to apply to the surface of metal a mixture of alumlna soap, volatile oils and aluminium or aluminium bronze .powder, and the surface so treated thenexposed to the open air or to heat or burned m, or the alumina soa compound was melted u ntl e metal before the application of the a umm um, and the coating polished, This process is very different from my invention as hereinbefore set forth.

' I'declare that what I claim is w The process of obtaining a brilliant metal- 5 lie looking surface, which consists in taking black plate, removing oxidation therefrom especially on the rim or edge, coating it with varnish, allowing the varnish to arrive at the tacky condition, applying the powdered 10 metal, and distributing the powder evenly over the entire surface, at the same time JAMES WALLACE BATON. Witnesses:

HUGH WATSON, THOMAS S. SHILLINGTON. 

